Electromagnetic clutch.



K. MIRAM & L. SEIDEL.

ELECTROMAGNETIC GLUTGH.

' APPLIOATION FILED rm. 1a, 1911.

2 1 9 1 2 W J d m H L b a P.

2 SHEETS-SHEET 1.

INVENTOHS.

K. MIRAM & L. ISEIDEL.

ELECTROMAGNETIC CLUTCH. APPLICATION FILED 312.13, 1911.

PATENT orrioE.

KULR'I MIRAM AND LOTHAR SE IDEL. 0F AAGHEN, GERMANY.

ELECTROMAGNETIC cnnrcn.

Specification of Letters-Patent.

, Patented Ju1y2, 1912.

Application filed Febriiary 13, 1911. Serial No..50 8,348.-

Electromagnetic Clutches, of whichdzhe following is a specification.

This invention has for its object various improvements in ele'ctro-magnetic friction clutches. These improvements enable a rapid,'powerful and yet' gentle coupling to be made without violent shock-"orvibr'ation. This re'su'lt-is obtained by decreasing as 'far as possible the mass of the moving parts.

These improvements allow a certain amount of movementbetween the two parts of the clutch so that inequalities in-the position of the axles are provided for. Moreover the clutch surfaces always remain in firm contact with each other if these surfaces, in

consequence of inexactlmovements or wear, are not exactly parallelto each other. Another objectof the invention is to provide such a construction of the magnets and the armature that the use of either single or multiphase alternating current is possible.

To carry out the first part of our invention .we arrange, on one half of the friction clutch, electro-magnets, the pole, surfaces of which-either'lie in oneplane at'right-angles to the axis, or the pole surfaceslof which. lie on the surface of a cone, whichflatter must be-coaxial'with the shaft. The axes of all poles may lie on one or more circles, concentric with the axis. The coils of the mag-- nets are connected in such a way that poles following each other are of opposite polarity; The two or .more terminals of the winding are connected to slip rings, which latter are arranged on the side of the half clutch opposite'the one to which the "poles are connected. The half ofthe clutch heretofore describedr'may preferably, but need not necessarily,'sbe the one .which receives the power fromthe source of energy. According i'tb'th'e'. method of driving, or the purposeffo'ri nfhihjth clutch is intended, this half of the'clutch may either be keyed to a shaft or can runloosely on the shaft or .a sleeve.

ries'themagnets,whilethe armature is connected to the driving disk in such a way that tllGsfiISl) part isaxially but not rotatably movable with respect to the second part In this respectzthe present invention is differcnt from the alreadyknown couplings, in which the whole powertransmi-tting disk must be displaced, so that themovingmasses can never be=-very smallp From this it follows that the attraction of the disk takes place more quickly and yet with a light blow. In order to give the coupling a certain elasticity or flexibility, the connection between the power transmitting disk and the armature is advantageously made by means of studs, which latter are loosely guided in the driving disk in order to allow the armaturea certain amount of movement at an angle to the axis, in case it should not be.at'rightranglesioithe axis in the first instance, so that any inaccuracies in its position are automatically eliminated by the slight angular motion of the armature,'until its surface is parallel with the ends of the poles.

in the rest' position of the clutch, the armature lies against the drivingdisk and is held injthis position bymeansof springs, mounted between the driving disk ;and the heads of the guide studs.

.In order to increase the flexibility, the guide holes for the .pins inzthe driving disk may be lined with rubber, or some other elastic medium. The'flexibility of the arma ture can also be obtained by other means instead of the loosely fitted studs, such as springs and suchlike.

Figures 1 and 2 show an example of a our invention, for continuous current; Fig. 1 being a longitudinal section, F ig.'-2 being a similar view of the-magnet disk-looked at from the pole ends, Fig. 3 shows the development of the poles, the magnetic flux being connected by dotted lines; Figs. 4 and 5 show a clutch for use with single or multi: phase alternating current; Fig. 4 being a partial longitudinal section, Fig. 5 being a pai'tial View of the disk showing a magnet po e.

1s assumed to receive the energy by means of.belt,gear wheels or other suitable connection to the source of energy, and is shown mounted on a sleeve, which latter is made in construction of a clutch in accordance with In the drawings 1, in Fig. 1, is thedriv- .ing part .of the clutch, which,. in this case,

the same, but all iron formi one with the bearing. The current is sup-,

-magnet's. The part 12 forms the second half of theclutch, and is, in the case'of the example, shown rigidly keyed to shaft 11, but

for certain applications it may be suitable "to run this part either loose on the shaft, or on a separate sleeve. 9 is the armature ring connected to the part 2 by means of studs 10, and in the rest position held resting against part 2, by means of spring 13. 14

indicates the bushes made from" elastic material.

Fig. 3 shows the development of the poles, the magnetic flux between the poles and the armature disk being indicated by dotted lines. It will be seen that north pole and south ole follow each other, and that two adjoining poles act like a horse-shoe magnet. In case the magnet poles arearranged with their ends lying on a cone surface, the armature must alsoabe arranged as part of a cone, but otherwise the construction would be the same.

In the case of single or multi-phase alternating current clutches, the construction as shown in Figs. 1 and 5 may be substantially part of the magnetic circuit must be laminated in the direction of the magnetic flux.

The disk 1'is formed with a carrier or support 18, which serves for receiving an iron band winding 15 (after the manner of the armature construction of the Schuckert flat ringdynamo) which is held in position by bolts 16. On this winding 15, the poles .3, are mounted at uniform intervals, and

again carry the coils 4, and. the like. The

.pole shoes 8 are preferably made in one .piece with the poles. The connection of the poles to the carrier is again effected by means of screws 7. The armature ring. 9 is also again made as a strip windin which is held ,by the 'carrier or support 17, t e latter being connected to disk 12, flexibly, as described heretoforej The action is exac-tl the same as the one hereinbefore describe We do not limit'our invention, which relates to alternating current couplings, to the arrangement of the movable armature 9 on the power-transmitting disk 12. The

armature can also be attached ri idly to the disk, so that the disk is axially isplaceable with the armature.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is 1. In electromagnetic clutches suitable for continuous or single or multiphase alternating current, the combination with a disk rigidly attached to one of the two parts to be coupled, said disk supporting separate magnet cores the centers of which lie on a circle, and the end surfaces of their poles lie on a rotating face, of a second disk-rigidly attached to the other of the two parts to be coupled, and an armature supporting a corresponding rotating face and mounted on said second disk so as to be axially but not rotatably displaceable.

2. In electromagnetic clutches suitable for continuous or single or multiphase alternating current, the combination with a disk rigidly attached to one of the two parts to be coupled, said disk supporting separate magnet cores the centers of which lie on a circle, and the end surfaces of their poles lie on a rotating face, of a second disk rigidly attached to the other of the two parts to be coupled, and an armature supporting a corresponding rotating face and mounted on said second disk so as to be axially but not rotatably displaceable, and means by which said armature in the coupledposition is made flexible, whereby a slight angular displacement relatively to said second disk is permitted.

3. In electromagnetic clutches suitable for single or multiphase alternating current, the combination with a disk rigidly attached to one of the two parts to be coupled, said disk supporting separate magnet cores the centers of which lie on a circle and the end surfaces of their poles lie on a rotating face, said cores being laminated in the direction of the magnetic flux, of a disk attached to the other of the two parts to be coupled and an axially displaceable armature supporting a corresponding rotating face and mounted on said second disk, said armature being also 

